Galaxy S2 shutting off in idle mode

Galaxy S2 shutting off in idle mode

Recently, I noticed that my phone shuts off while in sleep mode. This just happens when I don't check it for a while and the display is turned off. When I do go to check my phone, it's unresponsive, even if I hold down the power button. So far, I've had to remove the batter every time this has happened in order to reboot it.

I just don't get what the issue is. I'm probably missing phone calls because I'm not even aware that my phone is turning off. I feel like after the ICS update my phone has had issues. I already performed a factory reset last week since I was having a problem with the notifications not ringing and vibrating, and now, this is happening on top of that.

If anyone has any suggestions, that would be greatly appreciated.

I have a Samsung Galaxy S2 i777.

Oh, and another thing, I noticed that my batter is at 95-100% before it shuts off by itself, and once it boots up again it's down to 85-89%. I also feel like it might be an issue with overheating: I noticed that my phone feels hot after I've been using it for a while, like texting or using the internet, and then I set it down to do other stuff when I notice that it's turned off. My phone usually feels really hot too, and the case I have for my phone probably does not help either.

Re: Galaxy S2 shutting off in idle mode

SpartyOnK wrote:

Recently, I noticed that my phone shuts off while in sleep mode. This just happens when I don't check it for a while and the display is turned off. When I do go to check my phone, it's unresponsive, even if I hold down the power button. So far, I've had to remove the batter every time this has happened in order to reboot it.

I just don't get what the issue is. I'm probably missing phone calls because I'm not even aware that my phone is turning off. I feel like after the ICS update my phone has had issues. I already performed a factory reset last week since I was having a problem with the notifications not ringing and vibrating, and now, this is happening on top of that.

If anyone has any suggestions, that would be greatly appreciated.

I have a Samsung Galaxy S2 i777.

Oh, and another thing, I noticed that my batter is at 95-100% before it shuts off by itself, and once it boots up again it's down to 85-89%. I also feel like it might be an issue with overheating: I noticed that my phone feels hot after I've been using it for a while, like texting or using the internet, and then I set it down to do other stuff when I notice that it's turned off. My phone usually feels really hot too, and the case I have for my phone probably does not help either.

It's probably not shut off, but in a "sleep of death" state.

Which build are you running? I know Samsung's original I9100 Update4 kernel source release (ICS for the I9100) had some issues with SoDs. I would not be surprised of UCLE5 has the same problems and more, as AT&T has a bad habit of taking Samsung releases and adding more bugs, never fixing the existing ones. (For example, the UCLE5 build has a serious bug in the eMMC driver that can cause permanent unrecoverable damage to some phones if you do a data wipe/factory reset. The damage probability is relatively low, but it is nonzero.)

BTW, holding down the power button for 15-20 seconds will reset the device without a battery pull.

Unfortunately, stock kernel builds do not support /proc/last_kmsg, a technique for analyzing crashes like this. (If set up correctly, the device can save a log in memory of what happened prior to the crash or SoD.)

Re: Galaxy S2 shutting off in idle mode

My phone has just started doing the same thing. Once or twice a day when the phone is idle or asleep I will find that it has shut itself off. In order to get it to restart I've had to remove and replace the battery. Today I did realize that I can restart it by holding the power button in for an extended time.

There was an OTA update that downloaded to my phone late last week. Prior to that upate I have not had any trouble or issues at all. I'm very frustrated and hope to find an answer as to why this is happening and what I can do to fix the problem. I welcome any advice or suggestions. Thank you!

Re: Galaxy S2 shutting off in idle mode

I am here for the same reason and come to think of it it started right after my OS update. Anyone get any input from AT&T? I have also been getting dropped calls? The phone just goes right to my voice mail when someone calls me? And my phone is still on when this happens.

Re: Galaxy S2 shutting off in idle mode

Same problem with mine after the 4.0.4 update. I called AT&T tech support and they wouldn't admit there was a software problem. They suggested I do a factory reset on my phone. So, I backed up to Kies and made sure all my contacts were in my Gmail. Reset phone. I had a lot of apps that didn't come back over and a lot I didn't want to use anymore. Since doing the restore I have only had one shut off in two days. Before it was doing it 3 or 4 times a day. Battery llife seems to be better too so far. I'm pretty sure if I hollered more they would let me do an upgrade since I am due in March. I'd really rather just have my S2 work like its suppose to. So far its much better so we will see.

Re: Galaxy S2 shutting off in idle mode

I had the Wifi problem too but after I did the reset/restore it hasn't been an issue. No problems with calls though. Today my phone shut down again for no reason, first time in 3 days so its better maybe but it still shouldn't be doing that. Would be nice if AT&T would chime in here and give us some real solutions.

Re: Galaxy S2 shutting off in idle mode

Hi,

I am having the exact same problems with my phone after the ICS 4.0.4 upgrade. But, as far as I know this is the last update that Samsung Galaxy SII SGH I777 (AT&T) is going to get. There will be no Jellybean upgrade for SGH I777.

Re: Galaxy S2 shutting off in idle mode

I also am having the same trouble: random shut-offs while phone is asleep. I have tried nearly everything from deleting apps, new battery, factory reset, changing settings, etc. but the problem persists. sometimes its 3-4 times a day, some times its once a week.

Re: Galaxy S2 shutting off in idle mode

I forgot to add: my battery level will drop 5 to 30% or so following each shut down. I also have noticed the problem doesnt seem to appear when wifi is disabled, but I am still testing. I have also noticed a rise in phone temperature during a shut down episode.

Any chance of a patch? either from at&t or a third party.

And from browsing the web, this problem seems to exist for all versions of the gs2 regardless of carrier. Perhaps its a Samsung hardware problem..?